2.3-oxynaphthoic-acid derivative.



STATES PATENT OFFICE.

mm .KAHN' AND ANTON OSSENBECK, OF COLOGNE, GERMANY,- ASSIGNOBS TO SYNTHETIC PATENTS 00., 1110., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

1,140,747. Ho Drawing.

To all whomit may concem:

Be it known that we,- Mim'rm KAHN and ANTON Ossnmmcx, doctors of philosophy, chemists, citizens of the German Empire, residing at Cologne, Germany, have invented new and useful Improvements in 2.3- Oxynaphthoic-Acid' Derivatives, of which the following is a specification.

- We have found that new and technically valuable compounds can be obtained by condensing the 2.3-oxynaphthoic acid with an aminonaphthol, the new products having mula most probably the following general forare after being dried and pulverized, grayish powders soluble in a hot sodium carbonate solution. Upon unmordanted cotton impregnated with such a solution very valuable full, pure and .fast yellowish-red to brownish-red shades are obtained upon treatment with diazo compounds, two molecules of the diazo compound combining on fiber with one 7 molecule of the oxynaphthoylamidonaphthol.

more fully the following example is given, the parts being by weight: 18.8 parts of 2.3-oxynaphthoic acid are suspendedvin 100 parts of solvent naphtha together with 15.9

parts of 2.7-aminonaphthol. Subsequently at ordinary temperature 12 parts of phosphorus trichlorid are slowly added. The mixture is then heated in a vessel provided with a reflux condenser until the evolution of hydrochloric acid gas ceases. The mass of the reaction is poured into waterand the naphtha is distilled over with steam. The residue is boiled with dilute hydrochloric acid, washed with a cold dilute sodium carbonate solution and is redissolved from a hot dilute sodium carbonate solution. It is a uiggl-ayish-yellow powder having the-form z which issoluble in a hot sodium carbonate In order to illustrate the new process as 'oxvimrn'rnorc-ncm nnnrva'rivn;

solution. Upon unmordanted cotton im- Specification of Letters Patent. PatentedMay 25, 1915. Application filed September 11, 1914. Serial No. 861,280 I 1. The new compounds having most probably .the following general formula:

being derived from the 2.3-oxynaphthoic acid and an aminonaphthol, which are after being dried and pulverized-grayish powders soluble in a hot sodiumcarbonate solution;

which is a grayish-yellow powder soluble in a hot sodium carbonate solution; yielding on unmordanted cotton impregnated with this solution upon treatment with diazotized para-nitranilin fast scarlet-red shades, substantially as described.

In testimony whereof we have hereunto set our hands in the presence of two subscribing witnesses.

MYRTIL KAJEEN. ANTON OS SENBECK.

Witnesesi i A. H. Scmmnnn, I F. N. SEELEY. 

